I'm thinking about a "it's definitely delayed again " news post or just shove out a bunch of tweets explaining the reasons.
Basically:
newer LAN coming this fall
we're well beyond Rockstar's normal 6 month marketing scheme if they want to release this year derp already spring 2018 but that might turn into summer anyway...
... I had another reason but forget at the moment...
"Due to the immense and unprecedented success of GTA Online all forthcoming titles have been postponed indefinitely while we brief our marketing team on the best possible way to implement shark cards into every facet of the online gaming community while removing legitimately earned money from players and retroactively slashing job payouts to make the game 'more competitive'. Fuck you for your time and money - R* Games."